I had this problem with my retro good humor truck.With
the freezer box on the back.I had no storage area,so I
design a box behind the cab and front of the rear
fender, resting on the running board.I made it out of
wood and bondo. I made a model for one that would
become the metal one for both sides of the truck.Steve
http://i1305.photobucket.com/albums/s554/icecreamman55/004_zps39d0f889.jpg